Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could deaden deaden you could deaden deaden he could deaden deaden we could deaden deaden you could deaden deaden they could deaden deaden
V-ing form
I could be deaden deadening you could be deaden deadening he could be deaden deadening we could be deaden deadening you could be deaden deadening they could be deaden deadening
Perfect
I could have deaden deadened you could have deaden deadened he could have deaden deadened we could have deaden deadened you could have deaden deadened they could have deaden deadened
V-ing perfect
I could have been deaden deadening you could have been deaden deadening he could have been deaden deadening we could have been deaden deadening you could have been deaden deadening they could have been deaden deadening
Negation
Simple form
I couldn't deaden deaden you couldn't deaden deaden he couldn't deaden deaden we couldn't deaden deaden you couldn't deaden deaden they couldn't deaden deaden
V-ing form
I couldn't be deaden deadening you couldn't be deaden deadening he couldn't be deaden deadening we couldn't be deaden deadening you couldn't be deaden deadening they couldn't be deaden deadening
Perfect
I couldn't have deaden deadened you couldn't have deaden deadened he couldn't have deaden deadened we couldn't have deaden deadened you couldn't have deaden deadened they couldn't have deaden deadened
V-ing perfect
I couldn't have been deaden deadening you couldn't have been deaden deadening he couldn't have been deaden deadening we couldn't have been deaden deadening you couldn't have been deaden deadening they couldn't have been deaden deadening
Interrogative form
Simple form
could I deaden deaden? could you deaden deaden? could he deaden deaden? could we deaden deaden? could you deaden deaden? could they deaden deaden?
V-ing form
could I be deaden deadening? could you be deaden deadening? could he be deaden deadening? could we be deaden deadening? could you be deaden deadening? could they be deaden deadening?
Perfect
could I have deaden deadened? could you have deaden deadened? could he have deaden deadened? could we have deaden deadened? could you have deaden deadened? could they have deaden deadened?
V-ing perfect
could I have been deaden deadening? could you have been deaden deadening? could he have been deaden deadening? could we have been deaden deadening? could you have been deaden deadening? could they have been deaden deadening?
Interro-negative form
Simple form
couldn't I deaden deaden? couldn't you deaden deaden? couldn't he deaden deaden? couldn't we deaden deaden? couldn't you deaden deaden? couldn't they deaden deaden?
V-ing form
couldn't I be deaden deadening? couldn't you be deaden deadening? couldn't he be deaden deadening? couldn't we be deaden deadening? couldn't you be deaden deadening? couldn't they be deaden deadening?
Perfect
couldn't I have deaden deadened? couldn't you have deaden deadened? couldn't he have deaden deadened? couldn't we have deaden deadened? couldn't you have deaden deadened? couldn't they have deaden deadened?
V-ing perfect
couldn't I have been deaden deadening? couldn't you have been deaden deadening? couldn't he have been deaden deadening? couldn't we have been deaden deadening? couldn't you have been deaden deadening? couldn't they have been deaden deadening?